Airtac STA Single Acting Compact Guided Cylinder STA20X5B
The AirTAC Airtac STA Single Acting Compact Guided Cylinder STA20X5B is a genuine single-acting COMPACT cylinder (single acting, pull type) with a Ø20mm bore and 5mm stroke. Air pulles the rod and an internal spring returns it, so one solenoid line drives the motion — ideal for short-stroke clamping and ejection in tight spaces.
- BoreØ20 mm
- Stroke5 mm
- Port sizeM5×0.8
- Acting typeSingle acting, pull type
- Rod threadM4×0.7 (F) / M6×1.0 (B)
- CushionFixed NBR bumper
About the Airtac STA Single Acting Compact Guided Cylinder STA20X5B
The AirTAC STA20X5B is a compact single-acting pull-type cylinder where air retracts the rod and an internal spring extends it out. It delivers 108.9 N of net pull at 0.5 MPa, safely handling a working load of roughly 65 N or vertically lifting about 5.6 kg with a 2:1 margin. This 5 mm stroke unit uses a male M6x1.0 piston rod thread.
Its short riveted body saves valuable axial mounting depth where a longer cylinder will not fit. A fixed NBR bumper decelerates the stroke end, and the M5x0.8 port keeps pneumatic plumbing compact.
Airtac STA Single Acting Compact Guided Cylinder STA20X5B Technical Specifications
| Model | Airtac STA Single Acting Compact Guided Cylinder STA20X5B |
|---|---|
| Series | STA compact single-acting cylinder |
| Bore size | Ø20 mm |
| Stroke | 5 mm |
| Acting type | Single acting, pull type |
| Port size | M5×0.8 |
| Rod end thread | M4×0.7 female / M6×1.0 male (B) |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.2 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 50 – 500 mm/s |
| Cushion | Fixed NBR bumper |
| Max standard stroke | Up to 30 mm |
Specifications follow the official AirTAC SDA-family datasheet. Single-acting types start at 0.2 MPa (the spring must be overcome). Confirm against the product label before installation.
Net Output Force (Ø20mm, Pull)
| Pressure | Pull force (net) |
|---|---|
| 0.5 MPa | 109 N |
| 0.7 MPa | 162 N |
These are NET output forces — the return-spring force is already deducted. Single-acting pull only; the spring performs the opposite stroke. Size with a safety margin.
Model Code: Airtac STA Single Acting Compact Guided Cylinder STA20X5B
| STA | Compact single acting, pull type cylinder series. |
|---|---|
| 20 | Bore size in mm. |
| ×5 | Stroke length in mm (single-acting max 30 mm). |
| S | Built-in magnet for magnetic-switch sensing (omit = none). |
| B | Male-thread piston rod (omit = female thread). |
Thread: PT standard. SSA pushes out / spring returns; STA pulls in / spring extends. Related: SDA (double acting), SDAD (double rod), SDAJ (adjustable stroke).
Where the Airtac STA Single Acting Compact Guided Cylinder STA20X5B Is Used
Clamp Retraction
Pulls a short 5 mm tensioning clamp back to clear a machining envelope using 108.9 N of net force.
Gate Release
Uses the spring-extend function to push a diverter gate open at rest, with air pulling it shut.
Film Tensioning
Draws a packaging film guide inwards via the male M6x1.0 rod during the wrap cycle.
Is the Airtac STA Single Acting Compact Guided Cylinder STA20X5B the Right Cylinder?
When sizing this bore, stepping down to the STA16 yields 66.4 N at 0.5 MPa, while stepping up to the STA25 provides 177.7 N. This STA20X5B configuration includes the B option for a male M6x1.0 rod end and lacks the S magnet, meaning it cannot accept position switches.
The 5 mm stroke respects the 30 mm maximum limit. Remember the spring extends the rod to its rest position on air loss, so it will not hold a mid-stroke load without an external device. Operating pressure must be 0.2-1.0 MPa to overcome the spring.
Quick checklist
- ✓ Net pull force at your working pressure
- ✓ Stroke ≤ 30 mm (single-acting limit)
- ✓ Single air line saves a valve/port
- ✓ Magnet (S) for sensors?
- ✓ Female (blank) or male (B) rod thread
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.2 – 1.0 MPa operating pressure.
- check Remember the spring performs the return stroke.
- check Avoid side load on the short piston rod.
- check Front/rear covers are riveted — do not dismantle.
- check Installation by qualified personnel per AirTAC docs.
Airtac STA Single Acting Compact Guided Cylinder STA20X5B FAQ
This cylinder provides a net pull of 108.9 N at 0.5 MPa and 161.7 N at 0.7 MPa. It requires an operating pressure of 0.2-1.0 MPa, as at least 0.2 MPa is needed to overcome the internal return spring.
No, this specific SKU does not include the S option for a piston magnet, so it cannot accept reed or electronic switches. You would need the STA20X5BS variant to enable sensing capabilities.
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